Jurors also watched a video of Phylicia and Johnson. It showed a drunk Phylicia playfully grabbing Johnson's penis after a late night of streaking. The video was only visible to jurors and lawyers.

Deena testified that the same night the video was taken, about six months before Phylicia died, she saw Johnson make a pass at her sister.

"He reached forward, as if he was going to touch her sexually," Deena testified. "Phylicia just laughed and pushed his hand away."

When asked if she did anything about what she had seen, she said she thought about telling her father, but did not.

"I was scared I wouldn't be able to see Phylicia again, and my whole world right then and there would be crumbling," Deena said.

After that incident, Deena testified that her 10-year relationship with Johnson started to fall apart. On the day Phylicia disappear, Deena said Johnson avoided her texts at first, but later told her he wanted to repair their relationship.

Deena testified that a blue storage bin was missing from her apartment.

Prosecutors said Johnson killed Barnes in her sister's apartment and then used that storage bin to move her body. To help prove their theory, on Jan. 22, prosecutors said they wanted to use the bin in court and have someone about the same size as Barnes get in to show it's big enough to hold a body.

But Johnson's lawyers argued that no such container was ever found. They said witness statements are so confusing that the in-court demonstration by prosecutors shouldn't be allowed. The judge agreed but said another ruling could come later.

Prosecutors on Friday said they planned on calling a surprise witness in the case. During opening statements, prosecutors told jurors an acquaintance of Johnson, who was not identified, would testify he saw Barnes' body on the bed of an apartment where Johnson lived the day she disappeared.

Johnson is accused of killing the 16-year-old Barnes in December 2010 while she was visiting family in Baltimore.

Barnes' body was found in the Susquehanna River in Cecil County four months after she disappeared. Johnson was arrested a year later and charged with murder.